Change Template in List? (v2.1)

I'm trying to extend the new List component in Sencha Touch 2.1 (I'm using RC2) and I can't seem to change the item template dynamically. I'd like to be able to change item templates by pressing a button, but it won't work. It used to work in version 2.0.1. Is there anything I'm missing?

Calling setItemTpl() works in the initialize method, but not in edit() or editCompleted() methods.

When using setItemTpl on a list from controller, the list shows empty items. Calling list.refresh() makes no effect.
But when assigning itemTpl in the view, the list does render the items.
There was no such behavior in Sencha Touch 2.0.1.

Thanks. Any ETA for Sencha Touch 2.1.1? This is kind of a major bug for any non-trivial real-life project. We are eager to switch to Sencha Touch 2.1 for performance improvements alone, but can't do this because of this bug.